The world of smartphones changes mighty quickly, and if you blink, you're bound to miss the latest and most delectable devices. That's where we come in, to provide timely roundups of everything your friends expect you to know, along with the insight that you crave. To bring you up to speed, in ourDecember buyer's guide, at first blush you might have thought we were doing an overview of the best Android phones on the market. That's because of our 16 highly-esteemed handsets, a whopping 13 of them had Google's operating system at the core. As you'll see, the landscape has changed somewhat, and these new contenders that have come out swinging. We've broken down this buyer's guide by mobile carrier, each including the best handset money can buy, our favorite QWERTY alternative, and the most well-rounded budget phone available (with $79 as the absolute ceiling). For smaller US providers, we're providing a single selection, though we're confident it...